js 遍历行和列

var table = document.getElementsByTagName("table")[0]; ???//遍历列 ???for (var i = 0; i < table.rows[0].cells.length; i++) { ???????console.log(table.rows[0].cells[i].innerText); ???????if (!table.rows[0].cells[i].innerText) { } ???} ??????//遍历行 ???for (var i = 0; i < table.rows.length; i++) { ???????var row = table.rows[i]; ???????console.log(row.cells[0].innerText); ???}